Exam 3 - CHEM 241 Synthesis Reactivity I Exam#3 Name Lab...

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CHEM 241 Synthesis & Reactivity I Exam #3 – March 31, 2008 Name:____________________ Lab Section: Tu W T F This exam ends at 10:25 am as indicated by the clock in Althouse 110. In the space provided, give the best answer (3 points each) __ B __ 1. Which of the following is not a good nucleophile for this S N 1 reaction? Br Nuc Nuc + Br - a) H 2 O b) NaOCH 3 c) CH 3 OH d) CH 3 CH 2 OH __ B __ 2. Arrange the following carbocations from most stable to least stable: 1 2 3 4 a) 1 > 2 > 3 > 4 b) 4 > 3 > 2 > 1 c) 4 > 2 > 3 > 1 d) 3 > 4 > 2 > 1 __ C __ 3. Which of the following is the major organic product in the reaction below: Br NaOCH 3 CH 3 OH a) b) c) d) OCH 3 OCH 3 Br __ A __ 4. Which of the following products could be expected to form in the following reaction? I CH 3 OH OCH 3 1 2 3 4 a) 1, 2 and 3 b) 1 and 3 c) 1 only d) 4 only __ D __ 5. Which reagent would be the best to convert t -butanol into t -butyl bromide? OH Br a) CBr 4 b) PBr 3 c) NaBr d) HBr
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__ B __ 6. The major product from the reaction of trans -1-bromo-2-methylcyclohexane and t -butoxide is: O - Br CH 3 a) b) CH 3 CH 3 c) d) CH 3 O CH 3 O __ D __ 7. Elimination is favored over substitution when:
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Exam 3 - CHEM 241 Synthesis Reactivity I Exam#3 Name Lab...

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